考虑三次谐波转矩的双五相永磁同步电机串联系统直接转矩控制研究  

Research on DTC of Two Five-phase PMSM Series-connected System Considering Third-harmonic Torque

作　　者：段庆涛 周扬忠 DUAN Qingtao;ZHOU Yangzhong(Fujian Key Laboratory of New Energy Generation and Power Conversion(Fuzhou University),Fuzhou 350116,China)

机构地区：[1]福建省新能源发电与电能变换重点实验室(福州大学)

出　　处：《电源学报》2019年第5期186-196,共11页Journal of Power Supply

摘　　要：针对反电动势非正弦的2台五相永磁同步电机串联驱动系统提出一种3次谐波转矩补偿型直接转矩控制策略。首先通过坐标变换建立了考虑3谐波转矩的双五相PMSM串联系统的数学模型,基于电压矢量对转矩的控制关系,分别在2个子空间计算定子磁链增量的期望值;然后根据2台电机定子电压方程,计算出2个平面内电压矢量参考值,并提出一种占空比调制型空间矢量调制算法;最后,通过仿真与实验验证了所提控制算法的可行性。A third-harmonic torque compensation direct torque control(DTC)strategy is proposed for a series-connected drive system of two five-phase permanent magnet synchronous motors(PMSMs)with non-sinusoidal back electromotive force(EMF).First,the mathematical model of the drive system considering the third-harmonic torque is established th-rough coordinate transformation.Based on the control effect of voltage vectors on the torque,the expectation of stator magnetic flux increment in two subspaces are calculated,respectively.Then,based on the stator voltage equations of two motors,the reference values of voltage vector on two planes are calculated.In addition,a duty modulation type space vector modulation algorithm is proposed.Finally,the feasibility of the proposed control algorithm was verified by simulations and experiments.

关 键 词：反电动势非正弦 五相PMSM 双电机串联系统 空间矢量调制 直接转矩控制 

分 类 号：TM341[电气工程—电机]